Favourite sets right now?
mine is the nuisance meowscarada

set, try to get it in position and spam knock off.
I’ve been using Tera dark a lot more recently and it can become very annoying if your opponent is on the back foot. With Tera, it can do things like OHKO cinderace and 2hko standard (timid) bulkarona Volcarona 100% of the time, even if you get burned. Note: the slower bold bulkarona has a chance to beat the 1v1 matchup with a burn. At least it’s easy to predict the set based on the damage percentage.
it’s very annoying to deal with, there’s a finite list of knock off absorbers, and all hate dealing with the hazard support,
the set:

Meowscarada @ Black Glasses
Ability: Overgrow
Tera Type: Dark
EVs: 252 Atk / 4 Def / 252 Spe
Jolly Nature
- Knock Off
- Sucker Punch
- Flower Trick
- Taunt
sample replays:
https://replay.pokemonshowdown.com/gen9ou-1823359171
https://replay.pokemonshowdown.com/gen9ou-1819169506-gp3r02u5sl70vqts5hs7qccll65ich6pw
on the topic of the common switchins:

corviknight is possibly the most common default answer, it can sometimes be 2HKOd if there are hazards or it has previously taken rocky helmet damage on a u turn. Otherwise it’s a 50/50 on taunt or switch out.

kingambit is the hardest check to this set, as it takes negligible damage. However if it attacks back it hates rocky helmet support, and coming in regularly on hazards sucks for gambit. Basically dealing with this check requires hit and run tactics and plan for either an attack or a double switch if they know you have rocky helmet support

amoonguss can be 2HKOd if you plan out the play by play correctly. You’ll need hazard support. If you can’t get amoonguss into 2HKO range with your calculations, then it’s gonna be a problem, as once it’s item-less it has an easier time absorbing attacks.

these three are bundled together as they are all offensive switch ins. If dragonite is one of them, it loses its ability to keep multi scale up with hazards. Hydreigon can absorb the attacks, but then there’s 50/50 on taunt or switch out. Roaring moon is typically a one time answer, rocky helmet support can negate it.

booster energy iron valiant is a one-time hard counter. It’s pretty good tho, especially if you’re switching out and it gets a +1 calm mind. No real way to deal with this outside of trying to predict it switching in, etc.
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On the topic of the common “fairy type” Tera and other Tera resists:
this is a common way to neutralize meowscarada. If you’re concerned, try and scout before committing to knocking off that skeledirge, sucker punching that scarfed gholdengo, or flower tricking that 45% dondozo, etc.